Clinker grinder



April 6,1926. 1,579.775

A. G. MCGARVEY CLINKER GRINDER Filed sept. i6 1921 2 sheets-sheet 1 April 6 ,"1926. l A. G. MCGARVEY CLINKER GRINDER 2 Sheets-Sheet 2 Filed Sept. 16 1921 INVENTQR y ATTQRNEY .n aw C M A Patented Apr. 6, 1926.l

:UNITED STATES PATENT oFFicE.

ALBERT G'. IVICGARTEY,y OF WILKINSIBURGr,` PENNSYLVANIA,l ASSIGNOR TOWESTING- HOUSE ELECTRIC AND MANUFACTURNG COMPANY, Ay CORPORATION OF PENN- sYLvANIA. j

C'LINKER GRINDER.

Application flied september 1e, 1921. seriai No. 501,063.

To all iii/zona t may concern: i

Be it known that I, ALBERT Gr. MCGARVEY, a citizen of the United States, and a` resident of lllilkinsburg, in the county of Allegheny andState of Pennsylvania, have invented a new and useful Improvement in Clinker Grinders, of which the following is a specification. Y

This invention rclatestoclinker grinders for mechanically operated furnaces and has for an object to provide in anapparatus of kthe character designated a device associated with an intermediate bearing of a grinder roll, which shall serve to guide and properly to feed the refuse in the lower portion of the4 clinker pit. onto the clinker roll, and which shall at the same time offer a minimum supporting surface for-the refuse and prevent the lodgment of refuse upon the bearing and the bearing support. further object of my -invention'to provide, in addition, a means for y cooling such device audits associated bearing,`and also to prof vide in connection therewith means for cooling all metallic parts inthe lower portion of the clinker pit and for chilling the refuse suddenly so as to render the clinker content thereof friable.`

In the accompanying drawings, Fig. 1 is a vertical longitudinal view, partially in section and partially in elevation, taken through the clinker pitof a multiple retort AStoker, illustrating the construction and the disposition of my improved fluid cooled bearing cap to intermediate bearings of the grinder rolls; p

Fig. 2 is a fragmentary plan View ofthe clinker pit disclosed in Fig. 1, illustrating the relation of the clinker pit and bearing cap to the Stoker retortsand twyers; and

Figs. 3 and 4 are sectional views lof the bearing cap taken on line III--IILand line IV-IV, respectively,of Fig. 1.

size, and, consequently,`the clinker pitl near the bottom of which the grinder rolls are located is comparatively long. It becomes necessary, therefore, to provide the shaftsof the grinder rolls with one or moreinteimediate bearings. As heretofore construct'- ed, these intermediate bearings, being in contact with the hotrefuse which tends to It is a.

. adhere thereto, have served as rshelves for the lodgment and accumulation of refuse, which, at times, bridges the pit from side to side, and materially interferes with the efficient operation of the grinder rolls.

These diicultiesl `overcome bythe prorision of a wedge-shaped, fluid-cooled bearing cap which overlies each' intermediate bearing and bearing support, aud which pre? vents refuse from vlodging upon and adhering to the grinder bea-rings and supportsv ics therefor, thus contributing to a. more uniform disposal of the refuse by the grinder rolls."` I furthermore provide a series of,

apertures on each side of, and near the upper edge of the rwedge-shaped bearing cap for directing streams of cooling fluid from the capsinto the clinker pit.v This quenches any fuel'still yin process of combustion and suddenly chills the refuse so asA to render' theclinker therein friable prior to its passagetlirougli the grinder rolls.

my invention, I. have illustrated a clinker indicated the stokerby the numeral 10,'and the clinkerv pit vby the `numeral 11. The

` Referring to the drawingfor a detailed y understanding of anpapparatus embodying Stoker 10 comprises the usual alternate ar rangement of retorts 12, twyers 13, and ex-` tension plates 14, (see'Fig. 2) overwhich the ash, the clinker andany unburnedfuel passes into the clinker pit. The clinker pit illustrated v:has its front and rear walls each formedby a grate box 15, and an apron 17.

`It is to be understood, however, that the clinker pit may be constructed ina-ny suitable manner, the invention herein disclosed being in no way limited in its employment n to any specificforni of clinker pit.

p p f the'bottoin of the clinker pit are grinder Clinker grinders are commonly employed r `only in boiler installations of considerable supported from beams 24, secured to and' forming a artof the furnace frame 25, and

an upper `aringv blockv 26 secured to the Csi lower bearing bloc t Z3, as by bolts 27. The grindei` rolls may be each provided with a plurality of teeth or cutters 28,1n a manner common in grinder roll construction.

As illustrated in the drawings, a fluidcooled bearing cap, generally designated by numeral 80, is supported upon the upper block 26. The cap is wedge-shaped in section, the edge of the wedge being upwardly presented, and is pr-o-vided with a base portion 31 of dimensions coeXtcnsive with the upper surface of bloclr 26,'to which it is'secured by bolts 32. It is within the purview of the present invention, however, to malte the upper bearing bloclrQG and the cap 3() of a. single casting, a construction which has been found to be preferable 1n some installations. A main chambered portion 33 of the bearing cap is connected to the base portion by a central chambered portion 34, and by webs 35 located on each side thereof. The ends .of tie chamber portion 33 of thecap are in clined so as to lie adjacent-to the inclined aprons 17 of the clinlrer pit.` pertures 37 are provided in each side. of the mani chambere-d portion 33, preferably near the upper edge thereof, through which streams yo f the cooling fluid are delivered into the clinlrer pit. The cooling fluid, as for example, water, is supplied to thek cap 30, through a conduit 88, which preferably delivers the cooling fluid into the central portion Set of the cap.

The manner in which the fluid-cooled bearing cap facilitates the operation of the clinlrer-grinder is appa-rent from the above description. In brief, the hot refuse, which is continuously passing downwardly through the clinlrer-p'it, contacts on approaching the grinder rolls first with the fluid cooled bear ing caps. Duc to the low temperature of the caps, there is little or no tendency for the hot refuse to adhere to the cool bearingcap and, consequently, the refuse is guided downwardly onto the grinder rolls, where it is crushed and positively discharged. This enables the grinder rolls to operate at full capacity since any lodgment of the -refuse upon the bearing` or bearing support and any consequent bridging of the refuse therefrom is eliminated.' Furthermore, when the refuse has reached the lower portions of the ash pit, it has passed the zone in which coinbustion of any unburned fuel can take place. The spraying of the refuse at this point cools the ash and renders friable any clinler portions the eof. The cool refuse is more' readily crushed by the grinder rolls, and' passes through the rolls without adhering theelfective discharge area of the' clin-ker'pit.

My invention has been illustrated and described in connection with aytwo-roll cl'inker tliereto and without clogging ory minimiZing'l ble to the intermediate bearings of a grinder roll in clinlrer pits in which one roll only is employed, a type coinmoi'ily used in ash disposal mechanisms.

l/Vhile I have shown my invention in but one form, it will be obvious to those skilled in the lart that it is not so limited, but is susceptible of various other changes and modifications without departing from the spirit thereof, and I desire, therefore, that only 'such limitations shall' be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

What I claim is 1. In combination in a clinlrer pit, a grinder `roll in the lower portion thereof, a bearing for said roll intermediate the ends of said pit, and means including a guide member orerlyinf'g` the portion of said roll engaging with said bearing for rendering' the clinler portion of the refuse friable. i

In combination in a clinker pit, a grinder roll in the lower portion thereof, a bearing" for said roll intermediate the ends of said pit, and meansincludingl a guide member overlying said bearing for cooling the metallic parts in the lower portion of the clinlter pit and rendering` the clinlrci portion of the vrefuse' friable.

3. The combination with a clinkei' pit having a grinder roll in the lower portion thereof and a bearing for said roll intermediate the ends of said pit, of a bearing cap overlying said intermediate bearing` and means for supplying cooling liquid to said capsaid cap being formed to discharge said liquid therefrom and to the interior of said pit. i

4l; The combination with a- 'clinker pit having grinder roll in the lower portion there of and a bearing for said roll intermediate the ends of said pit, of a hollow bearing cap overlying said intermediate bearing, and means for Vcirculatinga cooling fluid through the hollow in said cap, said cap being formed to discharge said liquid therefrom and to the interior of said pit.

5. The combination with a clinlrer pit having a grinder Aroll in the lower portion thereof and a bearing for said roll intermediate the ends of said pit, of a hollow-chainbered bearing cap overlying said intermediate bearing, means for admitting a cooling fluid under pressure into said cap', and means for delivering the fluid in small streams from the cap into the clinlrer pit.

o. The combination with a clinlrer pit having a grinder roll lin the lower portion thereof and a bearing for said roll intermediateth'e ends of said pit, of a hollow wedgeshaped bearing Acap overlying said interii'iediate bearing, the edge of the wedge-shaped cap being at the top` of the cap and the `base ofthe wedge-shaped cap -overlying said intermediate bearing, and ineens for suppiying cooling liquid to said cap, said cap being formed to discharge said liquid thereirom and to the interior of said pit.

7. The combination with a elinker pitv having a grinder `roll in the lower portion hereof, and a. bearing for said roll intermediate the ends of said pit, of a hollow wedgeshaped hearing cap overly ig said intermediate hearing, the edge oiV the wedge-shaped Cap being at the top off the Cap and the hase oi the wedge-shaped cap overlying said intermediate bearing, and means for admitting a cooling Huid under pressure into said rap, said cap having apertures in the sides thereoffor delivering the cooling Huid in small streams into the elinker'pit.

8. In a furnace, the combination with a @linker pit having a plurality oi grinder rolls extending longitudinally through the lower portion of the pit, and transversely f aligned hearings for each of said rolls intermediate the ends of the pit, of a bearing Cap overlylng the aligned hearings, and means for circulating a cooling liquid through said Cap and discharging said liquid into the interior of said pit.

9. In a furnace, the combination with a @linker pit having a plurality of ygrinder rolls extending longitudinally through the lower portion of the pit, and transversely aligned bearings for each of said rolls intermediate the ends of the pitof a hollowchamhered hearing cap overlying the aligned hearings, and means for circulating a cooling liquid through the chamber in said cap and discharging said fluid into the interior of said pit.

.10. In a furnace, the combination with a vClinker pit having a plurality of grinder rolls extending longitudinally through the lower portion' of the `pit,fand transversely alined bearings for said rolls intermediate the ends of the pit,yof a hollowwedgeshaped bearing cap overlying said intermediate hearings,k the edge of the wedgefshaped cap being at the top of the cap and the base ot' the wedge-shaped cap resting upon said intermediate hearingsy and means 'for admitting a cooling iuid under pressure into said cap, and said cap having apertures lin* the sides thereof for delivering the'eooling fluid in small streams into the @linker pit.

In testimony whereof, I have hereunto subscribedmy name this 6th day of September, 1921. i l i ALBERT G. MCGARVEY. 

